Canadian Taxation is based on residency. Was your spouse a resident of Canada anytime during the tax year? If your spouse was, not a resident of Canada for the tax year then, the tax will be calculated on Canadian income only and not worldwide income. This could be the reason TurboTax is not calculating taxes on income earned outside of Canada as the status is set up as a non-resident base on the information entered in the software.
See the link below for your Canadian tax obligations as per the CRA:
https://www.canada.ca/en/revenue-agency/services/tax/international-non-residents/individuals-leaving...
